This easy-to-use distance sensor from Parallax employs sonar to detect objects from approximately 0.75 - 120 inches (2 cm - 3 meters). The Ping distance sensor has status LEDs and requires only one I/O pin. The on-board three-pin header makes the PING))) compatible with a solderless breadboard.

Features:

• Range: 2 cm to 3 meters (about 0.75" to 10')
• Supply Voltage: 5V +/-10% (Absolute: Minimum 4.5V, Maximum 6V)
• Supply Current: 30 mA typical, 35 mA maximum
• 3-pin interface (power, ground, signal)
• 20 mA power consumption
• Narrow acceptance angle
• Simple pulse in / pulse out communication
• Indicator LED shows measurement in progress
• Input Trigger: positive TTL pulse, 2 us minimum, 5 us typical
• Echo Pulse: positive TTL pulse, 115 us to 18.5 ms
• Echo Hold-off: 750 us from fall of trigger pulse
• Burst Frequency: 40 kHz for 200 us
• Size: 22 mm H x 46 mm W x 16 mm D (0.85 in x 1.8 in x 0.6 in)